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l J. HOFFMAN. Lead and Crayon Holder.

No. 223,511. Patented 1an. 13, 18801..

N:PErRs, PMoo-UTHOGRAPNER. WASHINGTON, D. C.

UNITED STATES PATENT OFFICE.

JOSEPH HOFFMAN, OF NEW YORK, N. Y., ASSIGNOR TO JOSEPH RECKEN- DORFER, OF SAME PLAGE.

LEAD AND CRAYON HOLDER.

SPECIFICATION forming part of Letters Patent No. 223,511, dated January 13, 1880.

Application filed October 23, 1879.

To all whom t may concern Be it known that I, J osEPH HOFFMAN, of the city, county, and State of New York, have invented certain new `anduseful Improve ments in Lead and Crayon Holders, of which the following),` is a specification.

My invention relates to that class of pencil or lead and crayon holders in which a sheath or handle provided with a lead-receiving bore 1o or tube is combined with lead-holding jaws and a clamping-sleeve movable to close or re lease the jaws according to the direction in which it may be moved.

My improvement consists in the combination, with the sheath'or handle provided at its front end with a cam, of a rotary clamping-sleeve provided with a cam or other projection, which rests against the cam-surface on the sheath, and acts, when the sleeve is'rozo tated in the proper direction, to move said sheath longitudinally upon a tapered or swellingl part on the jaws, in order to cause the latter to close together.

The nature of my improvement and the man- 2 5 ner in which the same is or may be carried into effect will be understood by reference to the accompanying drawings, in which- Figure 1 is a longitudinal central section of a lead or crayon holder embodying' my inven- 3o tion. Fig. 2 is a perspective view of the sheath with the clamping-sleeve removed.

The parts are represented on an enlarged scale for the salie of greater clearness.

The sheath or handle A is of ordinary or suitable construction, and is provided with the usual lead-reeeiving bore or tube a, and with jaws b, which can close or open to grasp or release the lead. These jaws, in the present instance, are formed by splitting the front end 4o of the tube a. On the front end of the sheath A is a cam, c, which, in this instance, forms part of aferrule, d, which is Iitted over and fastened to the front end ofthe sheath.

B is theclamping-sleeve, which at its rear `is contracted to tit the tube a.

encircles the sheath or ferrule, and atits front Within the sleeve is a cam or laterally-projecting,` annular iiange, e, which, when the sleeve is in position, rests updn the cam c. Beyond the sleeve the jaws are tapered or provided with 5o a swell or incline, f. The sleeve is held in place between the said incline f in front and the cam c in rear.

By partly rotating,` the sleeve the action of the two camsurfaees c and e will be such as to force the sleeve forward upon the incline j' with the eti'ect of closing theljaws.` A reverse rotary movement ofthe sleeve will release the jaws.

The sleeve may be held in place in other 6o ways than that above indicated-as, for instance, by a washer, g, Fig. l, which encircles the lead-holding tube in front of the sleeve-cam or flange e, and is retained in place by a projecting tongue or stud, h, on the tube. This washer will prevent the sleeve from moving far enough forward to permit its cam to ride over the forwardly-projeeting heels of the cam c on the handle.

Having' described my invention, what I 7o claim, and desire to secure by Letters Patent, 1s-

rlhe lead-receiving sheath or handle having a central tube or bore and lead-holding` jaws, and formed or provided with a cam on its front end, in combination with a rotary clamping-sleeve provided with an internal corresponding cam iiange or project-ion to meet said cam, and with a contracted front end to act upon the jaws, substantially as and for the 8o purposes set forth.

In testimony whereof I have hereunto set my hand this 18th day of October, A. D. 1879.

JOSEPH HOFFMAN.

Witnesses C. S. BRAIs'rED, JOE W. SWAINE. 

